C&I ESS PCS Reference Design
An illustrative main control / communication board reference design for C&I energy storage converters (PCS, 100–250 kW bidirectional) on the ESS side: a DSP + coprocessor handle bidirectional conversion control; two Ethernet ports connect through a switch IC to the EMS and local debugging; isolated CAN connects the BMS and isolated RS-485 connects the meter and fire protection; push-pull transformers provide the isolated supplies for the IGBT drivers; 24 V in-cabinet supply. Power-stage parts are selected separately for the DC bus voltage; this page marks the VOOHU parts available on the main control / communication board.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts and package pinouts on the right.
Illustrative Ethernet topology: the DSP connects over RMII to the 10/100 switch IC U3 (JL5104C, 3 + 1 ports); each of the two downstream ports passes ESD D1 (WHALD03G4U) and the VOOHU high-isolation LAN transformer T1 (WHSH16F01D4, 4800 Vrms) to the 1×2 RJ45 J1; cable-side center taps go to chassis ground through 75Ω×2 + 1nF/2kV, and chip-side center taps go to ground through 0.1µF. Port P0 is drawn with one pair; the other port and the other pairs are identical.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A Ethernet ×2 | RJ45 1×2 ports (EMS / debug) | J1 | RJ45 Connector | WH56I3288RGGG0121101 | VOOHU |
| 02 | A Ethernet ×2 | 10/100 LAN transformers ×2 (high isolation) | T1 | LAN Transformers | WHSH16F01D4 | VOOHU |
| 03 | A Ethernet ×2 | Ethernet port ESD array | D1 | TVS ESD | WHALD03G4U | VOOHU |
| 04 | A Ethernet ×2 | 10/100 switch IC (3 + 1 ports) | U3 | Ethernet Switch ICs | JL5104C-NI | VOOHU |
| 05 | B CAN / RS-485 | BMS CAN connector | J2 | — | — | Non-VOOHU |
| 06 | B CAN / RS-485 | CAN CMC | L1 | Signal Line Common Mode Chokes | WHAC-3225B-510U0 | VOOHU |
| 07 | B CAN / RS-485 | CAN ESD / TVS | D2 | TVS ESD | WHALD30E2B | VOOHU |
| 08 | B CAN / RS-485 | Isolated CAN transceiver | U4 | — | — | Non-VOOHU |
| 09 | B CAN / RS-485 | RS-485 terminals ×2 (meter / fire protection) | J3 | — | — | Non-VOOHU |
| 10 | B CAN / RS-485 | RS-485 GDT ×2 | GDT1 | GDT | WHGT090V1P0A | VOOHU |
| 11 | B CAN / RS-485 | RS-485 CMC ×2 | L2 | Signal Line Common Mode Chokes | WHAC-4532A-510U0 | VOOHU |
| 12 | B CAN / RS-485 | RS-485 ESD / TVS ×2 | D3 | TVS ESD | WHALD30E2B | VOOHU |
| 13 | B CAN / RS-485 | Isolated RS-485 transceiver ×2 | U5 | — | — | Non-VOOHU |
| 14 | C Isolated driver supply | Push-pull driver + rectifier / LDO | U6 | — | — | Non-VOOHU |
| 15 | C Isolated driver supply | Push-pull isolation transformer | T2 | Push-Pull Transformers | WHST06K02A0 | VOOHU |
| 16 | C Isolated driver supply | Push-pull driver + rectifier / LDO | U7 | — | — | Non-VOOHU |
| 17 | C Isolated driver supply | Push-pull isolation transformers ×N (IGBT drive) | T3 | Push-Pull Transformers | WHST06010A0 | VOOHU |
| 18 | D Control core | DSP + coprocessor (bidirectional conversion control) | U1 | — | — | Non-VOOHU |
| 19 | D Control core | Firmware flash | U2 | — | — | Non-VOOHU |
| 20 | E 24 V power | 24 V in-cabinet power connector | J4 | — | — | Non-VOOHU |
| 21 | E 24 V power | Bidirectional input TVS | D4 | TVS ESD | WHTB058VA | VOOHU |
| 22 | E 24 V power | Input power-line common-mode choke | L3 | Power Line Common Mode Chokes | WHAL-7060A-102T0 | VOOHU |
| 23 | E 24 V power | Buck converter (24 V → 15 V / 5 V) | U8 | — | — | Non-VOOHU |
| 24 | E 24 V power | Buck converter (5 V → 3.3 V / core) | U9 | — | — | Non-VOOHU |
| 25 | E 24 V power | Molded inductors ×2 (DC-DC) | L4 L5 | Molded Inductors | WHYT0630 Series | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 25 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the C&I ESS PCS reference design full package
Includes the full-board position list, datasheets for the recommended VOOHU parts and position-by-position selection notes. For selection advice tailored to your DC bus voltage (1000 / 1500 V), number of communication ports or driver power scheme, please include it in your requirements. We reply within 24 hours on working days.
